Hello Zhi Wei -   By "clear the value", it sounds like you mean that you want to replace car values of 0 with a missing value.   One approach is to connect a SAS Code node to your flow, and write code to perform the replacement.  Select the Code Editor property of the SAS Code node, and try code like this (let car_value be the variable name that corresponds to 'car value'):   data &em_export_train;   set &EM_IMPORT_DATA;   if car_value=0 then car_value=.;   run;   After the SAS Code node, continue your modeling flow.   Some customers prefer to perform re-coding in the ETL process that prepares the SAS data set before it is used in Enterprise Miner, rather than performing the re-coding in Enterprise Miner.  Use whichever approach you prefer.   Have a good week! ... View more